There is an exisiting tread Getting started on 23cm that has some useful info.
The 2nd part of the 23cm and 13cm equation is someone to have a QSO with ! Based on experiance you need to cultivate a number of chasers who will listen out for you.This means you need to beam in their direction. It also helps to announce when making 2m QSOs that you will be moving to 23cm and 13cm to pick up who may be able to work you for a 2nd time on annother band.
73 de
Andrew G4VFL